CN103909757A - Flexible printed circuit board and manufacturing method thereof and method for manufacturing substrate for liquid crystal panel - Google Patents
Flexible printed circuit board and manufacturing method thereof and method for manufacturing substrate for liquid crystal panel Download PDFInfo
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- CN103909757A CN103909757A CN201310407382.5A CN201310407382A CN103909757A CN 103909757 A CN103909757 A CN 103909757A CN 201310407382 A CN201310407382 A CN 201310407382A CN 103909757 A CN103909757 A CN 103909757A
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- flexible printed
- printed board
- liquid crystal
- photosensitive polymer
- polymer combination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
- B41N1/14—Lithographic printing foils
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
- Liquid Crystal (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention provides a flexible printed circuit board of a liquid crystal epitaxial film, wherein the flexible printed circuit board is formed by flexible printing with low-wettable ink as raw material of the new material of liquid crystal epitaxial film corresponding to a liquid crystal panel which is high in definition and excellent in function, and the flexible printed circuit board is uniform in thickness and excellent in reproducibility. The invention also provides a manufacturing method of the flexible printed circuit board and method for manufacturing a substrate for the liquid crystal panel. For the flexible printed circuit board (16), a printed surface (13) is roughened to make the root-mean-square slope of the rough curve to be R delta q 0.9 to 3.0 and the ratio to the surface area is 2.8-4.9. In the manufacturing method, a photosensitive resin composite layer (8) is formed on the profile surface (3) of the printed side (13) and irradiated by active rays to cure the layers of the photosensitive resin composite.
Description
Technical field
The present invention relates to be suitable for use in the flexible printed board and the manufacture method thereof that form liquid crystal orientation film of such as substrate for liquid crystal panel etc. through flexible printing, and used the manufacture method of the substrate for liquid crystal panel of flexible printed board.
Background technology
In order to form liquid crystal orientation film on the electrode forming surface of substrate for liquid crystal panel, work out use print process, especially the technology of flexible printing method.
Require liquid crystal orientation film even thickness and free of pinholes etc. as far as possible, and thin.
Therefore,, for the printing surface of the flexible printed board of flexible printing (keeping the face of ink when the printing), must there is high retentivity with respect to the ink of the raw material that becomes liquid crystal orientation film.That is to say, require printing surface to there is following feature, even the i.e. a small amount of ink corresponding with the thickness of liquid crystal orientation film, wrinkle can not occur yet or expose the style of calligraphy characterized by hollow strokes etc., and can keep the good retentivity of thickness as far as possible uniformly on the whole surface of printing surface.
For improving the retentivity of ink of printing surface, making printing surface be concaveconvex shape increases specific area, improves the wellability of printing surface with respect to ink.
For example in patent documentation 1,2, there is following record: by the more microspike with geometrical plane shapes such as circles is set on printing surface, via many microspikes and the ditch portion between them, make printing surface be concaveconvex shape, thus, can make the wellability with respect to ink of this printing surface improve.
In addition, in patent documentation 1,2, also record: by making the difference such as size or distribution, arrangement of in-plane of microspike, can at random control wellability by the region in printing surface.
Microspike for example can form by photoetching process.; preparation becomes the layer of the photosensitive polymer combination of flexible printed board raw material; and on this layer; the mask of the overlapping film that comprises the negative or positive that is formed with the trickle pattern (dot pattern etc.) corresponding with the flat shape of microspike, exposes in this state, making after photosensitive polymer combination is optionally cured corresponding to the pattern of mask; develop; remove uncured photosensitive polymer combination, thus, form many microspikes.
On printing surface, possess and have concaveconvex shape, the top end face of the many microspikes of this concaveconvex shape is arranged independently respectively and is formed across ditch portion, and wherein the top end face of many microspikes is the plane parallel with printing surface.
In addition, in patent documentation 3, there is following record: use the method for roughening arbitrarily of such as etching or sandblast etc. to make printing surface roughening, thereby form the male and fomale(M&F)s such as such as pears surface, and its surface roughness is defined as to (Ra is expressed as with center line average roughness) 1～5 μ m, wherein, this male and fomale(M&F) has concavo-convex sharpness of border unlike microspike and ditch portion, and unlike microspike shape or size rule random concavo-convex.
Patent documentation 1: TOHKEMY 2002-293049 communique
Patent documentation 2: No. 2933790 communique of TOHKEMY
Patent documentation 3: TOHKEMY 2009-34913 communique
Recently, although along with the high-definition of liquid crystal panel, the progress of multifunction, and be developed with these various new liquid crystal orientation films, but become the ink of the raw material of these new liquid crystal orientation films, compared with most of and existing ink, there is a kind of poor tendency of wellability for raw-material glass substrate as substrate for liquid crystal panel etc.
For example following situation is identified: with respect to the contact angle of soda-lime glass substrate, compared with the ink of existing 15 ° of left and right, the great majority of new ink are increased to 30 ° of left and right, thereby the wellability for soda-lime glass substrate of new ink is poor.
Therefore, new ink, in lip-deep self leveling of glass substrate etc., thus by before dry mobile come the automatically homogenized characteristic of thickness of decurl, in most of the cases not enough.Surface with respect to glass substrate etc. can infiltrate well, be the major premise of carrying out the mechanism of even thickness by self leveling, and mechanism cannot bring into play its function fully in the situation that wellability is poor.
In the situation that self leveling can not be given full play to, if the thickness of the ink layer after printing exists inhomogeneous,, this not being carried out just making ink dried, the thickness of liquid crystal orientation film may become inhomogeneous in the situation that of fully correction, may not reproduce predefined thickness.
Therefore, in order to use new ink, form thickness as far as possible evenly and the good and thin liquid crystal orientation film of thickness repeatability, require after printing by flexible printing, the thickness of ink layer becomes even at once.
But existing flexible printed board, exists in the time that new ink is combined, and can not meet fully the problem of related request.
For example, in the case of using the flexible printed board recorded of patent documentation 1,2, the thickness of ink layer is thinner, comprises to be formed at many microspikes of printing surface and the concavo-convex easier thickness to this ink layer of ditch portion impacts., the concaveconvex shape of printing surface is directly reflected in ink layer, thereby can not form even thickness and there is the good liquid crystal orientation film of good thickness repeatability.
This be due to, the top end face that has formed many microspikes of the plane parallel with printing surface is arranged respectively individually across ditch portion, and concavo-convex sharpness of border between microspike and ditch portion, the concaveconvex shape reason place for this reason of the printing surface so forming.
And in the time safeguarding, also existence is not easy the problem of removing the ink that enters ditch portion by washing.
On the other hand, the flexible printed board of recording at use patent documentation 3, due to the clear concaveconvex shape of the irregular obscure boundary of printing surface tool, concaveconvex shape can directly not be reflected into ink layer, and yet easily washing.
But, exist the thickness of ink layer easily to occur deviation by the region of printing surface, in ink layer, easily there is the problem of pin hole, thereby cannot form ink layer and even the liquid crystal orientation film even thickness and that thickness repeatability is good that there are not these problems.
Summary of the invention
The object of the invention is to, a kind of flexible printed board and manufacture method thereof are provided, and use the manufacture method of the substrate for liquid crystal panel of this flexible printed board, make it possible to use the low ink of wellability becoming corresponding to the raw material of the new liquid crystal orientation film of the high-definition of liquid crystal panel, multifunction, by flexible printing form even thickness and thickness repeatability good and the liquid crystal orientation film of the problems such as pin hole do not occur.
The present invention is formed as tabular and one side is set as the flexible printed board of printing surface, it is characterized in that, above-mentioned printing surface is roughened, and the root mean square slope R Δ q of roughness curve is more than 0.9 below 3.0, and specific area is more than 2.8 below 4.9.
In order to solve above-mentioned problem, inventor discusses sharpness of border concavo-convex unlike microspike and ditch portion and the improvement that is not easy the concaveconvex shape that occurs the printing surface of recording in the patent documentation 3 of concavo-convex impact.And, study the concaveconvex shape that can prevent following problem,, the thickness of ink layer occurs deviation by the region of printing surface, its result thickness repeatability reduces, and then produces pin hole.
Its result, if be in above-mentioned scope by the root mean square slope R Δ q of roughness curve and the specific area separate provision of printing surface of regulation in the JIS B0601:2001 of Japanese Industrial Standards " geometrical property specification (the GPS)-surface texture of product: contour curve mode-term; definition and surface nature parameter " of state of concaveconvex shape that represents printing surface, just can solve problem and reach object.
That is, due to be less than for the root mean square slope R Δ q of roughness curve 0.9 and the little printing surface of concavo-convex gradient for, pressure distribution when printing is easy to uneven homogenize, so easily produce pin hole on ink layer and even liquid crystal orientation film.On the other hand, due to exceed for the root mean square slope R Δ q of roughness curve 3.0 and the large printing surface of concavo-convex gradient for, concavo-convex protuberance is sharp-pointed and be easy to run through ink layer, so easily produce pin hole on ink layer and even liquid crystal orientation film.
With respect to this, owing to being defined as for the root mean square slope R Δ q of roughness curve more than 0.9 for the printing surface below 3.0, concavo-convex have an appropriate inclination, pressure distribution when printing is even, and protuberance is difficult to run through ink layer, so be difficult to produce pin hole on ink layer and liquid crystal orientation film.
And specific area and printing surface be with respect to the wellability of ink, and the maintenance dose of ink and from the liftability of the ink of printing surface and to the transfer printing amount of the ink of glass substrate etc., positive dependency relation there is.
In addition, if specific area is more than 2.8 below 4.9, can in the time carrying out flexible printing, guarantee suitable transfer printing thickness, thereby on the surface of glass substrate etc., can form that its thickness does not have deviation by the region of printing surface and evenly and there is the suitable ink layer of good thickness repeatability.
The present invention is the manufacture method of flexible printed board, it is characterized in that comprising following operation: prepare to comprise material dynamic rays to penetrability, and one side is formed as the operation of the mould of the figuration face corresponding with the shape of the printing surface of flexible printed board; Contact the mode of the figuration face of mould with photosensitive polymer combination, the operation of the layer of stacked photosensitive polymer combination on the figuration face of mould; See through mould and irradiate dynamic rays, make photosensitive polymer combination layer through curing reaction and curing operation; The operation that the photosensitive polymer combination layer having solidified is peeled off from the figuration face of mould; And, the photosensitive polymer combination layer after peeling off is made to the operation of flexible printed board.
According to the present invention, can high yield manufacture at low cost printing surface and be defined as the flexible printed board of specific surface state.
Preferably, in the operation of the photosensitive polymer combination layer after peeling off being made to flexible printed board, comprise following operation: the face (with the contiguous face of figuration face) that the figuration face from mould of photosensitive polymer combination layer has been peeled off is as the printing surface being roughened, and the operation of removing the rough surface of the printing surface beyond the region corresponding with printed patterns in the mode of machinery or heating.
Prepare the operation of mould and also can comprise following operation: prepare to comprise hard material, and there is the operation with respect to the supporting substrates of the penetrability of dynamic rays; Make the face with figuration face opposition side of mould contact surface and the fixing operation of supporting substrates.
Can use and comprise prepolymer, there is the monomer of at least a kind of ethene unsaturated group and the composition of Photoepolymerizationinitiater initiater as the photosensitive polymer combination of raw material that becomes flexible printed board.
The present invention is the manufacture method of substrate for liquid crystal panel, it is characterized in that, comprises: utilize flexible printed board of the present invention, by flexible printing, form the operation of liquid crystal panel liquid crystal orientation film.
According to the present invention, based on the surface configuration of previously described printing surface, can produce and possess even thickness and thickness repeatability is good and the substrate for liquid crystal panel of the liquid crystal orientation film of free of pinholes.
According to the present invention, a kind of flexible printed board and manufacture method thereof can be provided, and use the manufacture method of the substrate for liquid crystal panel of this flexible printed board, make it possible to use the low ink of wellability of raw material that becomes the new liquid crystal orientation film corresponding with high-definition, the multifunction of liquid crystal panel, by flexible printing form even thickness and thickness repeatability good and do not produce the liquid crystal orientation film of the problems such as pin hole.
Brief description of the drawings
Fig. 1 is that Fig. 1 (a)～(c) is the schematic diagram that the concaveconvex shape of the male and fomale(M&F) being roughened in flexible printed board is described by the difference of the root mean square slope R Δ q of roughness curve.
Fig. 2 is that Fig. 2 (a)～(c) is the profile that the manufacturing process of flexible printed board is described.
Fig. 3 is that Fig. 3 (a)～(c) is the profile that the subsequent handling of the manufacture method to Fig. 2 describes.
Fig. 4 is that Fig. 4 (a) and (b) are profiles that example describes of the surperficial method to the dismounting of roughening plate being fixed on freely to flat supporting substrates.
Description of reference numerals:
1 ... supporting substrates; 2 ... surface; 3 ... figuration face; 4 ... roughening plate; 5 ... opposing face; 6 ... photosensitive polymer combination; 7 ... strengthening membrane; 8 ... layer; 9 ... counter substrate; 10 ... opposed faces; 11 ... duplexer; 12 ... workbench; 13 ... printing surface; 14 ... laser head; 15 ... carbon dioxide gas volumetric laser; 16 ... flexible printed board; C ... chuck clamps.
Detailed description of the invention
Fig. 1 (a)～(c) is the schematic diagram that the concaveconvex shape of the male and fomale(M&F) being roughened in flexible printed board is described by the difference of the root mean square slope R Δ q of roughness curve.
The present invention is to be formed as tabular and is simultaneously the flexible printed board of printing surface.And printing surface is roughened, and the root mean square slope R Δ q of roughness curve is more than 0.9 below 3.0, and specific area is more than 2.8 below 4.9.
According to the present invention, the concaveconvex shape of the printing surface that regulation is roughened as described above, can use the low ink of wellability of the raw material that becomes the new liquid crystal orientation film corresponding with high-definition, the multifunction of liquid crystal panel, by flexible printing form even thickness and thickness repeatability good and the liquid crystal orientation film of the problems such as pin hole do not occur.
With reference to Fig. 1 (b), root mean square slope R Δ q for roughness curve is less than 0.9, and such concavo-convex little printing surface of gradient as shown in the figure, the easy uneven homogenize of pressure distribution during due to printing, so easily produce pin hole on ink layer and even liquid crystal orientation film.
On the other hand, with reference to Fig. 1 (c), root mean square slope R Δ q for roughness curve exceedes 3.0, and such concavo-convex large printing surface of gradient as shown in the figure, because thereby concavo-convex protuberance sharply easily runs through ink layer, so easily produce pin hole on ink layer and even liquid crystal orientation film.
With respect to this, with reference to Fig. 1 (a), be defined as more than 0.9 for the printing surface below 3.0 for the root mean square slope R Δ q of roughness curve, due to such concavo-convex appropriate inclination that has as shown in the figure, and pressure distribution when printing is even, and protuberance is difficult to run through ink layer, so be difficult to produce pin hole on ink layer and liquid crystal orienting film.
In order further to improve this effect, preferably the root mean square slope R Δ q of roughness curve is more than 1.2 below 2.7.
In the present invention, according to using for example sweep type confocal laser microscope to measure the roughness curve obtaining, the root mean square of the slope local dz/dx in such datum length of recording in the 4.4.1 item " the root mean square slope of contour curve " using the root mean square slope R Δ q of roughness curve as JIS B0601:2001 is tried to achieve.
And, for the level and smooth printing surface that is less than 2.8 for specific area, because the wellability of ink is low, so that the maintenance dose of ink becomes is too low.On the other hand, for the large concavo-convex printing surface that exceedes 4.9 for specific area, the wellability of ink is too powerful and cannot guarantee suitable transfer printing thickness while making flexible printing.Thus, in these any situations, all can not on the surface of glass substrate etc., form its thickness and not produce deviation and even and suitable ink layer by the region of printing surface.
With respect to this, by specific area is included in more than 2.8 in the scope below 4.9, can give the suitable wellability of printing surface with respect to ink.Thus, make to form on the surface of glass substrate etc. its thickness does not produce deviation by the region of printing surface and evenly and the good suitable ink layer of thickness repeatability become possibility.
In addition, in order further to improve relevant effect, preferably specific area is more than 3.0, especially more than 3.6, and below 4.6, especially below 4.0.
In the present invention, according to the three-dimensional data in region of certain area (benchmark area) that uses the printing surface that for example measuring shape laser microscope is measured, the long-pending ratio with respect to benchmark area of real surface using specific area as this field of trying to achieve by 3 D analysis is tried to achieve.
For being formed as, the printing surface of flexible printed board meets the concaveconvex shape of the scope of root mean square slope R Δ q and the scope of specific area of roughness curve simultaneously, in the manufacture method of the flexible printed board of the present invention next illustrating, the figuration face of the mould corresponding with printing surface is formed as meeting to the concaveconvex shape of above-mentioned scope.
And, for figuration face being formed as meeting the concaveconvex shape of above-mentioned scope, carry out roughening in for example increased pressure board moulding by the knurling rolls with following and form this figuration face, the outer peripheral face of knurling rolls is formed as meeting to the concaveconvex shape of above-mentioned scope.
Particularly, for example, in the situation that knurling rolls are metallic roll, by methods such as etching, sandblast, laser engravings, and in the situation that knurling rolls are rubber rollers, by methods such as dress mould, grinding, minute impurities, in the situation that knurling rolls are resin roll, by methods such as dress mould, grinding, etching, minute impurities, can make this outer peripheral face be concaveconvex shape.
Wherein, in the time for example making the outer peripheral face of metallic roll be concaveconvex shape by sandblast, in order respectively root mean square slope R Δ q and the specific area of roughness curve to be become to above-mentioned scope, control particle diameter (more than F600) and the sandblast time of the sand powder using.
Flexible printed board can produce by manufacture method of the present invention.Thus, can high yield produce at low cost printing surface and be defined as the flexible printed board of specific surface state.
Fig. 2 (a)～(c), Fig. 3 (a)～(c) are respectively the profile that the manufacturing process of flexible printed board is described.
With reference to Fig. 2 (a), in this routine manufacture method, the hard materials such as the hard resin of first preparing to comprise glass or allyl resin, polycarbonate resin, mylar etc., and have with respect to the supporting substrates 1 of penetrability of ultraviolet isoreactivity ray that can make photosensitive polymer combination generation curing reaction.
In addition, on the surface 2 of the upside in the figure of supporting substrates 1, by one side be set as figuration face 3(figuration face 3 there is being roughened of the concaveconvex shape corresponding with the shape of the printing surface of flexible printed board surface) roughening plate 4 by figuration face 3 upwards and the downward mode of the face of opposition side (opposing face) 5, make opposing face 5 contact with surface 2 on one side, on one side for example as dashdotted arrow in Fig. 2 (a) is represented, little by little stacked etc. to the other end from its one end, thus dismounting is fixed freely.
In addition, although in the drawings, emphatically draw significantly and formed the concavo-convex of figuration face 3, to should be readily appreciated that, but, for the shape etc. of the liquid crystal orientation film to printing not exerts an influence, actual concavo-convex for meet the present application defined the scope of root mean square slope R Δ q of roughness curve and the scope of specific area concavo-convex, if and the size of roughening plate 4 to that indicated in the drawings compares, the degree of distinguishing for setting out small concavo-convex.
As roughening plate 4, preferably use increased pressure board moulding by using such as knurling rolls etc., to comprise the thermoplastic resin of such as polyethylene (PE), polypropylene (PP), TPUE (TPU), PETG (PET), tetrafluoroethene hexafluoropropylene copolymer (FEP) etc., and have with respect to the surface of the thin plate of the penetrability of dynamic rays and carry out roughening and the thin plate that forms.
Described increased pressure board forming device has the following advantages: even for example large-area roughening plate 4 corresponding with the liquid crystal display cells of giant-screen also easily carries out continuous and a large amount of production.
In addition, the more soft thermoplastic resin that comprises PE, PP, TPU etc. and the roughening plate 4 of thinner (for example following degree of 150 μ m), exist itself sticky strength little, be difficult to make it be close to equably the situation on the surface 2 of smooth supporting substrates 1 without CREASE MARK ground.
In this case, as long as will comprise such as PET etc., and have that to stick on the opposing face 5 of roughening plate 4 with respect to the stiffener of the penetrability of dynamic rays first-class.
Because of the shear force by smear aqueous photosensitive polymer combination on this roughening plate 4 time, or convergent force when photosensitive polymer combination curing etc., for the replacement that prevents the roughening plate 4 after roughening plate 4 uses when skew with respect to supporting substrates 1 occurrence positions becomes easy, therefore preferably by any one method in following (I)～(II) for example, 4 dismounting of roughening plate are fixed on freely on the surface 2 of supporting substrates 1.
(I), via comprising the weak adhesion coating having with respect to the material of the penetrability of dynamic rays, dismounting is adhered freely and is fixed on the surface 2 of supporting substrates 1.
(II) forms air-breathing groove on the surface of supporting substrates, and carries out vacuum suction via this air-breathing groove, thereby dismounting is adsorbed and is fixed on surface freely.
The state launching between a pair of chuck clamps that (III) separates with the interval larger than the size of the in-plane of supporting substrates 1, carrys out dismounting crimping freely and is fixed on the surface of supporting substrates.
As the fixing weak adhesion coating of the adhesion for (I), can adopt any one comprise with respect to the formation material of supporting substrates 1 and roughening plate 4 there is weak adherence and have with respect to the various stickers of the penetrability of dynamic rays layer.For weak adhesion coating, can be by the various coating method such as such as spray application, at least one side in the surface 2 of supporting substrates 1 and the opposing face 5 of roughening plate 4, apply sticker and form.
After weak adhesion coating is formed to the surface 2 of supporting substrates 1 and/or the opposing face 5 of roughening plate 4, if as shown in the dashdotted arrow in Fig. 2 (a), his end from the one end on the surface 2 of supporting substrates 1 to another, note not allowing air enter between opposing face 5 and surface 2 while stacked roughening plate 4 little by little,, by the adhesion strength of weak adhesion coating, roughening plate 4 can be fixed on surface 2.
In addition, for by fixing roughening plate 4 from surface 2 operations of taking off for, for example with the arrow of Fig. 2 (a) on the contrary, from the other end of supporting substrates 1 to one end, resist the adhesion strength of weak adhesion coating while little by little this roughening plate 4 peeled etc.
For the sorption of carrying out (II) is fixed, in making smoothly the surface 2 of supporting substrates 1, in the roughly whole plane on this surface 2, form air-breathing groove.Air-breathing groove is connected in the vacuum system that comprises vavuum pump etc.
In addition, roughening plate 4 is overlapped under the state on surface 2 of supporting substrates 1 downwards opposing face 5, make vacuum system work, or the vacuum system that has made to start in advance work is connected with air-breathing groove etc., carry out vacuum suction via this air-breathing groove, roughening plate 4 can be fixed on thus on surface 2.
For by the roughening plate 4 of having fixed from for 2 operations of taking off of surface, vacuum system is quit work, or cuts off being connected of vacuum system and air-breathing groove.
Fig. 4 (a) is (b) profile that the crimping fixing means of (III) is described.
With reference to these two figure, in this crimping fixation, prepare a pair of chuck clamps C, it keeps in the mode across its whole length for 2 limits that are parallel to each other that are for example formed as accordingly the roughening plate 4 of rectangular shape with the shape of the screen of liquid crystal display cells.
As roughening plate 4, prepare length L 1 between 2 limits than the size L between the 2 corresponding limits of the supporting substrates 1 that is formed as equally rectangular shape
2long thin plate, and 2 limits are kept by chuck clamps C in the mode across its whole length.Though not shown, roughening plate 4 keeps figuration face 3 with the state of the upside in figure.
In addition, by separating than the size L of supporting substrates 1
2configuration card plate clamp C is carried out at longer interval, between two chuck clamps C, makes roughening plate become the state (Fig. 4 (a)) of tight expansion.
Next, under this state, if by chuck clamps C is moved to the below in figure, make to be deployed in the direction decline to the surface 2 of supporting substrates 1 as shown in white hollow arrow in Fig. 4 (a) of roughening plate 4 between chuck clamps C, as shown in Figure 4 (b), seamlessly be crimped on supporting substrates surface 2, roughening plate 4 can be fixed on surface 2.
And, for by fixing roughening plate 4 from for 2 operations of taking off of surface, this roughening plate 4 is moved upward from surperficial 2 on the contrary together with the arrow of a pair of chuck clamps C and Fig. 4 (a).
With reference to Fig. 2 (b), in the manufacture method of this example, to being fixed on by above-mentioned any one method on the figuration face 3 of the roughening plate 4 on the surface 2 of supporting substrates 1, supply with the aqueous photosensitive polymer combination 6 of ormal weight.
In addition, photosensitive polymer combination 6 is located in to roughening plate 4 and becomes between the strengthening membrane 7 of enhancement Layer on one side, on one side as shown in dashdotted arrow in Fig. 2 (b), from the one end on the surface 2 of supporting substrates 1 to the other end, little by little note not making air on the figuration face 3 of roughening plate 4, to smear photosensitive polymer combination 6 on one side in the middle of entering and form the layer 8 of photosensitive polymer combination, and photosensitive polymer combination layers 8 on stacked strengthening membrane 7.
Next,, with reference to Fig. 2 (c), the opposed faces 10 of counter substrate 9 is touched on strengthening membrane 7.
In addition, make on one side to separate constant compartment of terrain between the opposed faces 10 and surperficial 2 of counter substrate 9 and remain parallel, as shown in black arrow in Fig. 2 (c), by pressing counter substrate 9 to the direction of supporting substrates 1, make layer 8 be crimped on the figuration face 3 of roughening plate 4 on one side.
In addition, in this state, as shown in solid arrow in Fig. 2 (c), see through supporting substrates 1 and roughening plate 4 and through dynamic rays LB, layer 8 is exposed, make the photosensitive polymer combination 6 that forms layer 8 that curing reaction occur.
At this moment, the interval between the surface 2 of supporting substrates 1 and the opposed faces 10 of counter substrate 9, the thickness that is maintaining the flexible printed board of manufacturing adds the size of the thickness of roughening plate 4.
In addition, counter substrate 9 can be formed by the material arbitrarily of metal, glass, hard resin etc.
Especially, also can by counter substrate 9 by same with supporting substrates 1 have with respect to the material of the penetrability of dynamic rays form, in addition, strengthening membrane 7 also by same with roughening plate 4 have with respect to the material of the penetrability of dynamic rays form, the layer 8 of photosensitive polymer combination is exposed through dynamic rays from these counter substrate 9 sides, thereby make it to produce cross-linking reaction.
Next, with reference to Fig. 3 (a) (b), by strengthening membrane 7, the layer 8 being crosslinked and the duplexer 11 of roughening plate 4, from taking out between supporting substrates 1 and counter substrate 9, make it to reverse up and down, strengthening membrane 7 is loaded down on workbench 12.
In addition, as shown in dashdotted arrow in Fig. 3 (b), if roughening plate 4 is little by little peeled to the other end from one end of duplexer 11, the upper surface side in layer 8 figure becomes the concaveconvex shape of the figuration face 3 that has been transferred roughening plate 4 and the printing surface 13 that is roughened.
Next, as shown in Figure 3 (c), by the region to beyond the region corresponding with printed patterns of printing surface 13, for example, scan and irradiate carbon dioxide gas volumetric laser 15 etc. from laser head 14, removing the concavo-convex of surface with mode of heating.Thus, printing surface 13 is patterned into the printed patterns of regulation, thereby completes flexible printed board 16.
As photosensitive polymer combination, can use the resin combination arbitrarily with following features: can by ultraviolet ray etc. dynamic rays solidify, and after solidifying, can form solidfied material, this solidfied material has the suitable caoutchouc elasticity that is applicable to such as flexible printing etc., and in the ink that uses during with respect to printing of this solidfied material, comprise or the solvent resistance of the solvent that uses when the cleaning of printed panel good.
As related photosensitive polymer combination, be not limited to this, still can enumerate: comprise and for example have 1,2-butadiene structure and there is endways the composition etc. of prepolymer, ethylene unsaturated monomer and the Photoepolymerizationinitiater initiater of the two keys of ethene.
As Photoepolymerizationinitiater initiater, preferably benzoyl alkyl ether, especially preferably use benzoyl containing the material below the 500ppm of the proportional total amount for photosensitive polymer combination, wherein benzoyl is by reacting and make the reason of printing resin master flavescence from the visible ray of fluorescent lamp etc.Thus, can obtain the good printing of the light resistance resin master of not flavescence at short notice.
As strengthening membrane 7, identical with roughening plate 4, can use thermoplastic resins such as comprising such as polyethylene (PE), polypropylene (PP), TPUE (TPU), PETG (PET), tetrafluoroethene hexafluoropropylene copolymer (FEP) and there is the thin plate with respect to the penetrability of dynamic rays.
The present invention is, comprises with flexible printed board and forms the manufacture method of the substrate for liquid crystal panel of the operation of liquid crystal panel liquid crystal orientation film by flexible printing.
According to the present invention, surface configuration that can be based on previously described printing surface, manufactures and possesses even thickness and thickness repeatability is good and the substrate for liquid crystal panel of the liquid crystal orientation film of free of pinholes.
The operation of other of above-mentioned manufacture method, can similarly implement with existing method.
; manufacture by the following method substrate for liquid crystal panel: in the one side of the transparency carriers such as soda-lime glass substrate; form the transparent electrode layer corresponding with the matrix pattern etc. specifying; form liquid crystal orientation film by the flexible printing of having used flexible printed board of the present invention afterwards, further should need, by modes such as frictions, orientation process is carried out in the surface of liquid crystal orientation film.
In addition, prepare 2 pieces of substrate for liquid crystal panel, and under the state that each transparent electrode layer is aimed the place, sandwich betwixt liquid crystal material and interfix, and should, at two outsides configuration Polarizers of duplexer, make thus liquid crystal panel.
As previously described above, manufacture method of the present invention is follow the high-definition of liquid crystal panel, multifunction and developed, and is suitable for the formation using the ink poor wellability with respect to glass substrate etc. as raw-material liquid crystal orientation film.
Poor and become the ink of liquid crystal orientation film raw material as this wellability, for example there are and comprise METHYLPYRROLIDONE as solvent, and the large ink of the ratio of above-mentioned METHYLPYRROLIDONE etc.
Particularly, can be using the such as Optomer(オ processed of JSR Co., Ltd プ ト マ ー) (registration mark) AL60702 etc. enumerates as the ink poor with respect to wellabilities such as glass substrates, but is not limited only to this.
The present invention is not only defined in the example in the figure describing in the above.For example, also can omit strengthening membrane 7.And, for the layer of photosensitive polymer combination, also can replace the mode of pressing to the direction of supporting substrates by counter substrate, and adopt roller by roughening plate etc. to smear to make the mode of constant thickness.
Other, not departing from the scope of main idea of the present invention, can implement various changes.
[embodiment]
< embodiment 1>
(roughening plate)
As roughening plate, with the plate of the figuration face that TPU surface is roughened as the increased pressure board moulding by with knurling rolls, wherein, this TPU surface is, the TPU surface of exposing to the opposition side of face being pasted with stiffener of TPU plate, and this TPU plate to be the PET plate that is 100 μ m using thickness be pasted on TPU plate in one side as stiffener that (シ Le Network ロ Application (registration mark) the SNESS80-150 μ of great Cang Industrial Co., Ltd system m).This roughening plate has with respect to the ultraviolet penetrability as dynamic rays.
According to using sweep type confocal laser microscope (the LEXT(registration mark of Olympus Co., Ltd system) OLS(registration mark) 3100) measure the roughness curve obtaining, by the root mean square slope R Δ q of the roughness curve of figuration face, root mean square as the slope local dz/dx in the datum length of recording in the 4.4.1 item " the root mean square slope of contour curve " of JIS B0601:2001 is obtained, and result is 2.0.Wherein, datum length is made as 270 μ m.
And, according to the three-dimensional data in the region of certain area (benchmark area) of the printing surface that uses measuring shape laser microscope (Co., Ltd's Keyemce VK-9510 processed) to measure, real surface using the specific area of figuration face as this region of trying to achieve by 3 D analysis amasss and obtains with respect to the ratio of benchmark area, and result is 2.8.Wherein, benchmark area is made as about 0.06mm
2(59484.48 μ m
2).
(manufacture of flexible printed board)
With reference to Fig. 2 (a)～(c), printing possesses the level and smooth transparency glass plate with ultraviolet penetrability and the counter substrate 9 as supporting substrates 1 with the manufacturing installation of resin master, and on the surface 2 in printing with the supporting substrates 1 of the manufacturing installation of resin base plate, by roughening plate 4 by its figuration face 3 upwards, opposing face 5 downwards, opposing face 5 and surface 2 modes that contact, layer carrying out dismounting and be fixed freely via spray sticker.
Next, on figuration face 3, supply with aqueous photosensitive polymer combination (sumitomo rubber Industrial Co., Ltd NK resin processed) 6 ormal weights of ultraviolet hardening on one side, and photosensitive polymer combination 6 is located in to roughening plate 4 and strengthening membrane (the PET film that becomes enhancement Layer, the BF/CF processed of sumitomo rubber Industrial Co., Ltd) between 7, as shown in the dash-dot arrows in Fig. 2 (b), from the one end on the surface 2 of supporting substrates 1 to the other end, thereby the layer 8 of little by little noting not making air enter centre while smear photosensitive polymer combination 6 formation photosensitive polymer combinations on the figuration face 3 of roughening plate 4, and at the folded strengthening membrane 7 in layer 8 upper strata of photosensitive polymer combination.
Next, the opposed faces 10 of counter substrate 9 is touched on strengthening membrane 7.
Then, on one side will opposed faces 10 with surface 2 between separate certain interval and remain parallel, as shown in black arrow as middle in Fig. 2 (c), press counter substrate 9 to the direction of supporting substrates 1 on one side, thus, make layers 8 figuration faces 3 that are crimped on roughening plate 4.
Then, in this state, as shown in solid arrow in Fig. 2 (c), see through supporting substrates 1 and roughening plate 4 and layer 8 is exposed through ultraviolet ray, making to form layers 8 photosensitive polymer combination 6 curing reaction occurs.Use the UV light source of PHILIPS Co.'s system as light source.
Next, with reference to Fig. 3 (a) (b), by strengthening membrane 7, the layer 8 being crosslinked and the duplexer 11 of 4 one-tenth of roughening plates, from taking out between supporting substrates 1 and counter substrate 9, and make it to reverse up and down, strengthening membrane 7 is put down on workbench 12.
Then, as shown in dashdotted arrow in Fig. 3 (b), roughening plate 4 is little by little peeled to the other end from one end of duplexer 11, and the upper surface side in layer 8 figure becomes the concaveconvex shape of the figuration face 3 that has been transferred roughening plate 4 and the printing surface 13 that is roughened thus.
Next, as shown in Figure 3 (c), to the region beyond the region corresponding with printed patterns of printing surface 13, scan and irradiate carbon dioxide gas volumetric laser 15 from laser head 14, thereby this region is removed with mode of heating, thus, printing surface 13 is patterned into the printed patterns of regulation, thereby produces flexible printed board 16.
Composition condition is as follows,, the output of carbon dioxide gas volumetric laser: 400W × 2 bundle; Beam diameter: 20 μ m; Feeding pitch: 60 μ m; Feed speed 140cm/ second.
After composition, be called KS-HG シ Application Na with Sun Chemical Co., Ltd's commodity processed and wash the dirt producing by melting spittle resin, after this, make it to be dried fully.
According to measuring with aforesaid sweep type confocal laser microscope the roughness curve obtaining, by the root mean square slope R Δ q of the roughness curve of the printing surface of flexible printed board 16 13, root mean square as the slope local dz/dx in same datum length is obtained, and result is 2.0.
And, the three-dimensional data in the region of the measuring shape laser microscope above using and the same benchmark area measured, the long-pending ratio with respect to benchmark area of real surface using the specific area of printing surface 13 as the region of trying to achieve by 3 D analysis is obtained, and result is 2.8.
From above result, can confirm following situation: the concaveconvex shape of the printing surface 13 of flexible printed board 16 has verily copied the concaveconvex shape of the figuration face 3 of roughening plate 4.
(embodiment 2～9, comparative example 1～4)
In embodiment 2～9, comparative example 2,3, the knurling rolls of roughening are carried out on the TPU surface of having changed for the opposition side of face with being pasted with stiffener of the TPU plate identical with the TPU plate using at embodiment 1 is exposed by increased pressure board moulding, and root mean square slope R Δ q and the specific area of having prepared the roughness curve of figuration face are the roughening plate 4 of the value shown in following table 1～table 3.
And, in comparative example 1,4, replace the TPU plate using in embodiment 1, and prepare figuration face to carry out delustring processing and form and the root mean square slope R Δ q of roughness curve and specific area are that the PET film of the value shown in following table 1, table 2 (is split into Industrial Co., Ltd's system, Network リ ア ベ ー ス product), be used as roughening plate 4.
In addition, except using each roughening plate 4 parts, all the other have manufactured flexible printed board 16 according to the mode identical with embodiment 1.
Try to achieve root mean square slope R Δ q and the specific area of the roughness curve of the printing surface 13 of this flexible printed board 16 according to method same as described above, result, as shown in following table 1～table 3, can be confirmed following situation: the concaveconvex shape of the printing surface 13 of flexible printed board 16 has verily copied the concaveconvex shape of the figuration face 3 of roughening plate 4.
[table 1]
[table 2]
[table 3]
< physical device test >
(flexible printing)
By the flexible printed board 16 of manufacturing by each embodiment, comparative example, together with distributor rollers #400, be applied in flexible printing machine for liquid crystal orientation film (the form A45 of Na カ Application テ Network ノ Co., Ltd system).
In addition, by (オ プ ト マ ー (registration mark) AL60702 of JSR Co., Ltd system of varnish for liquid crystal orientation film, contact angle with respect to soda-lime glass substrate is: 30 °), after on the soda-lime glass substrate that flexible printing is 0.7mm in thickness, at 120 DEG C, heat 30 minutes, make varnish predrying, thereby form liquid crystal orientation film.
The condition of setting flexible printing is: the thickness of the liquid crystal orientation film after predrying becomes
(evaluation of thickness repeatability)
Measure the thickness of the liquid crystal orientation film after predrying, evaluate thickness repeatability by following benchmark.
000: thickness is
whole.
00: thickness is
in addition, and 1000 ±
in.
Zero: thickness is 1000 ±
in addition, and 1000 ±
in.
×: thickness is 1000 ±
in addition.
(pin hole evaluation)
Observe the liquid crystal orientation film after predrying, evaluate having or not of pin hole by following benchmark.
00: find no pin hole and the recess that formed by pin hole etc.
Zero: though do not find pin hole, find recess that formed by above-mentioned pin hole, local thickness's attenuation.
×: find that there is pin hole.
(synthetic determination)
From the result having or not of thickness repeatability and pin hole, carry out synthetic determination flexible printed board by following benchmark.
0000: thickness repeatability be 000 and pin hole have an inaction flexible printed board of 00.
000: thickness repeatability be 000 and pin hole have an inaction flexible printed board of zero; Or thickness repeatability be 00 and pin hole have an inaction flexible printed board of 00.
00: thickness repeatability be 00 and pin hole have an inaction flexible printed board of zero; Or thickness repeatability be zero and pin hole have an inaction flexible printed board of 00.
Zero: thickness repeatability be zero and pin hole have an inaction flexible printed board of zero.
×: any one party or two sides are × flexible printed board.
Above structure is shown in table 4～table 6.
[table 4]
[table 5]
[table 6]
Known according to the result of the embodiment 1～9 of table 4～table 6, comparative example 1～4: to be more than 0.9 below 3.0 by making the root mean square slope R Δ q of roughness curve of printing surface of flexible printed board, and the specific area that makes printing surface is more than 2.8 below 4.9, can use the low ink of wellability of the raw material that becomes the new liquid crystal orientation film corresponding with high-definition, the multifunction of liquid crystal panel, and can form even thickness and thickness repeatability good and the liquid crystal orientation film of the problems such as pin hole do not occur.
And, especially known according to the result of embodiment 1～5: in order to form the further good liquid crystal orientation film of especially thickness repeatability that has promoted above-mentioned effect, preferably specific area is more than 3.0, especially more than 3.6, and is below 4.6, especially below 4.0.
Further, known according to the result of embodiment 6～9: in order to form the good liquid crystal orientation film of further especially free of pinholes or the recess etc. that have promoted above-mentioned effect, preferably the root mean square slope R Δ q of roughness curve is more than 1.2 below 2.7.
Claims (6)
1. a flexible printed board, it is formed as tabular and one side for printing surface, and this flexible printed board is characterised in that,
Described printing surface is roughened, and the root mean square slope R Δ q of roughness curve is more than 0.9 below 3.0, and specific area is more than 2.8 below 4.9.
2. a manufacture method for flexible printed board, is characterized in that, its manufacture method that is flexible printed board claimed in claim 1, and it comprises:
Preparation comprises material dynamic rays to penetrability, and one side is formed as the operation of the mould of the figuration face corresponding with the shape of the printing surface of flexible printed board;
Contact the mode of the figuration face of mould with photosensitive polymer combination, the operation of the layer of stacked photosensitive polymer combination on the figuration face of mould;
See through mould and irradiate dynamic rays, make photosensitive polymer combination layer through curing reaction and curing operation;
The operation that the photosensitive polymer combination layer having solidified is peeled off from the figuration face of mould; And
Photosensitive polymer combination layer after peeling off is made to the operation of flexible printed board.
3. the manufacture method of flexible printed board according to claim 2, is characterized in that,
The photosensitive polymer combination layer after peeling off is made in the operation of flexible printed board, comprise face that the figuration face from mould of photosensitive polymer combination layer has been peeled off that is with contiguous of figuration face as the printing surface being roughened, and the operation of removing the rough surface of the printing surface beyond the region corresponding with printed patterns in the mode of machinery or heating.
4. the manufacture method of flexible printed board according to claim 2, is characterized in that,
The operation of preparing mould comprises:
Preparation comprises hard material, and has the operation with respect to the supporting substrates of the penetrability of dynamic rays;
Make the face with figuration face opposition side of mould contact surface the fixing operation of supporting substrates.
5. according to the manufacture method of the flexible printed board described in any one in claim 2 to 4, it is characterized in that,
Use comprises prepolymer, have the monomer of at least a kind of ethene unsaturated group and the composition of Photoepolymerizationinitiater initiater as photosensitive polymer combination.
6. a manufacture method for substrate for liquid crystal panel, is characterized in that, comprising:
Right to use requires the flexible printed board described in 1, forms the operation of liquid crystal panel liquid crystal orientation film by flexible printing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-001987 | 2013-01-09 | ||
| JP2013001987A JP5727526B2 (en) | 2013-01-09 | 2013-01-09 | Flexographic printing plate and manufacturing method thereof, and manufacturing method of substrate for liquid crystal panel |
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| CN103909757A true CN103909757A (en) | 2014-07-09 |
| CN103909757B CN103909757B (en) | 2018-01-09 |
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| Country | Link |
|---|---|
| JP (1) | JP5727526B2 (en) |
| KR (1) | KR102008531B1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20140090543A (en) | 2014-07-17 |
| JP5727526B2 (en) | 2015-06-03 |
| JP2014133335A (en) | 2014-07-24 |
| KR102008531B1 (en) | 2019-08-07 |
| TW201427822A (en) | 2014-07-16 |
| CN103909757B (en) | 2018-01-09 |
| TWI561383B (en) | 2016-12-11 |
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